Pitman connection



C. PEARSON. PITMAN CONNECTION. APPucAnoN mio ma. 26,1919.

Patented Aug. 8, 1922.

INTERNATIONAL, HAR.-

vnsrna conirANY, A oORronATioN or NEW, ,TERSEY- I :PrriuaN CONNECTION.

iaaaeas.

T0 all La/wm t may concern:

Be itA known vthat I, CHARLnsPnARsoN, a citizen' of the United States, residing at Chicago, inthe county of Cook andbtate of Illinois, have'invented certain 'newland -useful Improvements in Pitman Connections, of which the following is a full, clear, and exact specific-ation.`

rThis invention relates'to pitman connections vfor mowers and like machines. f

The invention has among its objects to provide a construction by means of which a pitman Amay be easily and quickly connected to and disconnected from the element with which it co-operates.

A further obj ect is'to provide a connection by means ofvwhich the wear between 'the itman and the co-operating element may be iliaken up, thereby providing'an eilicientoperating connection between these-parts. f Y

In the embodiment of the invention'illustrated, the pitinan is provided with a pair of resilient straps and strap engaging mem bers', means also being provided for manipulating the strap engaging -members in such a manner as to force the straps toward each 'otherintoengagement with a bearing or cooperating element when the operating means is moved in onedirection and to release the straps when the operating memberis'moved inthe opposite direction.y f Theop'e'rating member isin this instance also so constructed and located with respect tot-he bearing memberwhich is positioned between the outer ends of the pitman, that this operatingl member willengage the bearing member and force the pitman away from said member whenthe operating member is thrown to strap-opening position. f

' In the drawing jI have yillustrated one embodiment of my invention, and

' Figure 1 shows a top plan View of the pitman connection, the straps being shown in clamping position; l

I Fig. 2 is a side elevation of the construction shown iii-Fig. 1, the' open position of the operating member being shown in dotted lilies; and I Fig. 3 is a top plan view of the construction shown in F ig. 1 with the clamping *membersv and straps in open position, the operating member being shown partly in section in order to more clearly show thereonstructon.

I Specification of Letters Patent. paient-,ed Aulo, AApplication yined February 2s, i919.` serial No. 279,439.

which are The body member 10 of the pitman,`pref erably 'made of wood,vis vof the usual construction, and this member has secured thereto at oneend resilient pitman straps 11, secured by means of suitable riv- 4 ets 12. The straps 11 are provided at their outer endsk with semi-spherical bearing sur'- faoes 18` adapted toengagewith a bearing memberl which 'in the case ofafrnowing machine is carried by the knife head. l The outer `surfaces of the end` portions fof the strapsare provided with bearing surfaces 15 which co-operate with and the outer ends offL..-shaped strap-engaging members 16. The vopposite ends 17 ofthe members 16 are cylindricalin outline and are received by angularly disposed sockets 18 formed in a barrel portion19 of the operating member forthe strap engaging and clamping` membe'rsl. The barrel portion 19 is rotatably mounted in thealigned apertures 2O formed in the pitman straps adjacent the bearing surfaces 13, 'and this barrel member has formed integrally therewith an operating lever 21 having a rear tion/22 which seats on the upper surface of the pitinan stra-ps when the operating member1 is in clampingposition. A central portion 23 of the operatingmember is adapted 'are 'engaged by.

end porto engage the spherical bearing member 14 whenthe operating member is thrown to strap'opening position, as shown in dotted lines in Fig-f2. vIf the operating member is Yfurther rotated in anvanticlockwise direction beyond the dotted lineposition of Fig. 2,

this member will force the ball or bearing member lt from betweenfthe straps, thereby separating.thepitman from the cooperating member.. y

- In order to retain `the cylindrical portions 17 of the L-shapedstrap-engaging members 16 in the sockets 18, I have provided a series 'of leaf springs 24 which cpo-operate with each other, and by the engagement ofthe ylongest springs with the strap engaging '11 members 16 retain "these members in their sockets. l

Particular attention is here called'to the tion shown in full lines in Figs. 1 and 2 to the position shown in dotted lines in Fig: 2,

and also shown vin Fig. 3, the strap engagingk portions of' the members 16 are ymoved through an angle from the positioiishown in Fig. 1 to the position shown in Fig. 3,'

thereby releasing the straps from their clamping 'posit-ion. The triction'between the cylindrical portions 17 of the strap-engag,

ing members 16 and the wallso'f the-sockets 18 ormedin the barrel portion 19 is suficient tovretain the members 16in the barrel portion as the f voperating member is moved. from. open to closed position. It desired, suitable flanges may be formed on the edges of the/straps to protect thesp-rings 24 und theengagingmember 16 from damage.

- From the showing in Fig. 3, it `will be seen that when theoperating member is in 'strap-opening position the springs 241 will press the members 16 into the sockets, and, as above explained, the Jfriction between the members and the walls of the socket is sufficient, to retain these members in such a position that they gagement of the straps with the bearingmeinberr 14 whenthe` operating member is vso tionand' arrangement of vparts may 'be made which do not depart `:from the yspirit and scope of the invention as disclosed` in the appended claims. l

Claims: 1

1. In a pitman connection, a pitman having resilient straps, a plurality of strapengaging members contacting with `said straps, and means for changing the angle of said members substantially in a plane at right angles to the plane of .said straps, thereby forcing the straps toward eachother vand releasing said straps.

a pitmanihava plurality. of L-shaped V2. In a pitman connection, ing resilient straps,

strap-engaging members contact-ing with.

said straps, and means for changing the 'angle of said members with respect to said straps, thereby Jforcingy the straps `toward each other and releasing said straps.

3." In a pitman connection, a pitman having resilient straps, a plurality of jmembers vengaging said straps, an operating member pivoted on said straps and loosely carrying will insure the proper enstraps and said engaging members, and means for holding said engaging members in positionl on said operating member. 4

4. In a pitman connection, ing resilient straps, an operat-ing member journaled on said straps, strap-engaging members rotatably mounted in said operating member, the axes of rotation 'of said strap-engaging members being angularly disposed with respect to the axis of rotation of said operating member.

, 5. In a pitman connection, a pitman having resilient straps, an operatinglmember journaled on said pitman, strap-engaging membersrotatably mounted in said operata pitman ing member, the axes of said strap-engaging y members being so disposed with respect'to the axis of rotation of said operatingmember that said members will rforce saidstraps toward each other as said operating member is moved in one direction about itsy axis, and will. release said straps as the operating member is moved inthe opposite direction about its axis. l y

6. In a pitman connection,;a.1: itman having resilient straps, anv operating member having va barrel portion journaled on said the said barrel portion having outwardly extending sockets, the axes of said sockets being angularly disposed with respecty to the axis O15-rotation or saidbarrel portion, and 'strap-engagingv members having-portions, seated in the socketsjof said barrel portionof said operating member.

l 7. In a pitman connection, a pitman having resilient straps, an operating member having a barrelportion journaled on said straps and the said barrel portion having outwardly extending sockets, thel axes of said sockets being angularlydisposed Awith vrespect to the axis ofrotation of said barrel portion, 'strap-engaging members 4having portions seated in the socketso saidibarrel portion ot said operating member, land means for retaining said strap-engaging members in said sockets.

Y 8. In a pitman connection, a pitman having resilient straps, a strap engaging meniber 'for each strap having a shank portion and a strap-engaging portion, and means engaging said Shank said members to force said straps toward each other.

9. Inv a pitman connection, a pitman having resilient straps, a strap engaging member `for each strap portion, and a strap-engaging portion, and means engaging said shank portions for having anpangular shank iio l,115 portions for actuating actuating said membersv to force vsaid straps 11. In a p-itman connection, a pitman having resilient straps, strap-Controlling members having strap-engaging portions, and means for positively moving' vbodily said strap-engaging portions toward and away from each other. I y

12. In a pitman connection, a pitman having straps vone of which is resilient, a member having a portion engaging said resilient strap, and means for oscillating said member bodily in such a manner as to force said resilient strap toward the other strap.

13. In a pitman connection, a. pitman having straps one of Which is resilient, a strapeontrolling member having a portion engaging said resilient strap, andmeans for moving said strap-controlling member about a changing pivot in such a manner as to force said resilient strap toward the other strap.

14. In a pitman connection, a pitman having straps one of Which is resilient, a strap controlling member having a. portion engaging said resilient strap, and means for moving said member bodily in such a manner as to positively force said resilient strap to- Ward and away from the remaining strap.

l5. In a pitman connection, apitman having straps one of Which is resilient, a strapcontrolling member having ai 'portion engaging said resilient strap, and an angular shank portion, and means engaging said shank portion, and. means Aengaging saidv shank portion for moving said member about a changing pivot in such a manner as to force said resilient strap toward the remaining strap.

17. In a pitman connection, a. pitman having resilient straps, a lever movable through substantially 180o relative to said straps, and

strap engagin members movable relative to and eontrollec by said lever. f

18. In a pitman connection, a pitman having resilient straps, strap-controlling members having strap-engaging portions, a lever pivoted to said straps, and means *for positively moving said strap-engaging portions relative to lsaid lever.

19. In a pitman connection, a pitman having resilient straps, a lever mounted in said straps, strap-engaging members for clamping said straps, and means for moving saidi strap-engaging members in a plurality of` planes by said lever.

In testimony whereof I aiiix my signature.

CHARLES PEARSON. 

